MDP has been using geographic information systems (GIS) to answer questions and formulate scenarios for close to 40 years. A GIS is simply a map. When you go to an Internet roadmap for directions, you are using a GIS. MDP is pleased to make some of our most valuable data available to the public as interactive GIS maps. Just like the online roadmap, you can search and address and learn about the surrounding area. The maps convey Information such as population change (Census 2010), how much residential development has occurred (residential growth) and the area where you vote (legislative districts), to name a few.